
1562: Tink Tank
Canadian Wildfire Smoke, PM 2.5, Air Quality Alerts
Massive wildfires in Canada have sent a thick orange haze across the Eastern United States, triggering hazardous air quality alerts for 150 million Americans. The smoke is measured by "PM 2.5" particulate matter, which is small enough to enter the lungs and bloodstream. Skepticism is expressed regarding the lack of direct video footage of the fires and the effectiveness of cloth masks against fine particulates.


